Image analysis – Image enhancement or restoration – Artifact removal or suppression
Reexamination Certificate
2006-07-21
2010-12-28
Bali, Vikkram (Department: 2624)
Image analysis
Image enhancement or restoration
Artifact removal or suppression
C382S131000
Reexamination Certificate
active
07860341
ABSTRACT:
In one example of an embodiment of the invention, a method to correct for ring artifacts in an image is disclosed. A first Cartesian image is reconstructed based on data received from an imaging device, and the first Cartesian image is transformed into a first polar image. A first low-pass filter is applied to the first polar image, in the radial dimension, to form a second polar image, and the second polar image is subtracted from the first polar image to generate a third polar image. A second low-pass filter is applied to the third polar image, in an angular dimension, to form a fourth polar image, and the fourth polar image is transformed to Cartesian coordinates to form a second Cartesian image. The first Cartesian image is corrected based, at least in part, on the second Cartesian image.
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Mostafavi Hassan
Pavkovich John
Star-Lack Josh
Bali Vikkram
Fujita Katrina
Kaye Scholer LLP
Sklar, Esq. Brandon N.
Varian Medical Systems Inc.
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